A difference in density between gases creates bouyancy which is thr ability of an object to float. At 0 c, helium

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

a = 3.14

b = 18

c = 18/5 or 3.6 or 3 3/5

step-by-step explanation:

could you provide figure.

1. a^4+8a^3+24a^2+32a+16

2.y^8+8y^7+28y^6+56y^5+70y^4+56y^3+28y^2+8y+1

3.x^6-3x^4y^2+3x^2y^4-y^6